This report presents geochemical analyses for 220 mostly altered and
mineralized rock samples from the Red Dog Zn-Pb-Ag district in the
western Brooks Range of northern Alaska. These data form the basis
for a study by Slack et al. (2004a) on hydrothermal silicification
and related alteration in wall rocks of the Red Dog deposits and the
Anarraaq deposit 10 km to the northwest. The sulfide deposits occur
within the Ikalukrok unit (informal name) of the Mississippian Kuna
Formation (Moore and others, 1986). Principal rock types that were
analyzed include black and gray shale, unmineralized bedded barite,
mineralized (sulfide-rich) bedded barite, sulfide-rich silica rock
(replaced barite), massive and semimassive sulfide, vein chalcedony,
and Brookian (Cretaceous) vein quartz. For stratigraphic
completeness, data are also reported here for a limited number of
unaltered and unmineralized samples of black and gray shale,
laminated carbonate-rich shale, lithic turbidite, bedded siliceous
rock, calcareous radiolarite, and tectonic mélange. Detailed
descriptions of the sampled sulfide deposits and their stratigraphic
settings are given in Slack and others (2004a) and Kelley and
others (2004a, b). The geochemical analyses are presented here in
Microsoft Excel and .dbf spreadsheet formats in order to facilitate
calculations and plotting of data. A related geochemical database on
unaltered Paleozoic sedimentary rocks of the western Brooks Range is
available in Slack and others (2004b).
Purpose:
These data form the basis for a study by Slack et al. (2004a) on
hydrothermal silicification and related alteration in wall rocks of
the Red Dog deposits and the Anarraaq deposit 10 km to the
northwest.
Supplemental_Information:
Data for elements, oxides, and other components are presented either
in weight percent or parts per million, except for Au that are in
parts per billion. Qualified values (shown by the '<' symbol)
represent values less than the specified minimum detection limit
(MDL). In some cases, the MDL for a particular element or
component is not uniform, which reflects changing analytical
conditions or matrix effects, or use of newer ICP-MS instruments
that have higher precision and lower MDLs. For statistical
treatment of data and other calculations, it is recommended that
qualified values be substituted by one-half the analytical
detection limit (Sanford and others, 1993). Note that the
abbreviation "n.a." refers to a lack of analysis for the specified
element or component.
Values for the magnitude of the Ce and Eu anomalies are also
presented. The magnitude of the Ce anomaly, Ce/Ce*, is calculated as:
Ce[CN]/((La[CN])**0.667 * (Nd[CN])**0.333)
where Ce[CN], La[CN], and Nd[CN] represent normalization of
Ce, La, and Nd respectively to average chondrites using the
data of Nakamura (1974). The magnitude of the Eu anomaly,
Eu/Eu*, is calculated as:
Eu[CN]/(Sm[CN]*Gd[CN])**0.5
with chondrite normalization of Eu, Sm, and Gd represented
respectively as Eu[CN], Sm[CN], and Gd[CN].
In these formulae, two asterisks (**) are used to represent
exponentiation; one alone indicates multiplication.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -163.272222
East_Bounding_Coordinate: -162.500000
North_Bounding_Coordinate: 68.170621
South_Bounding_Coordinate: 68.065714
Keywords:
Theme:
Theme_Keyword_Thesaurus: Gateway to the Earth version 1.0
Theme_Keyword: geochemistry
Theme_Keyword: rocks and deposits
Theme_Keyword: mass spectroscopy
Theme_Keyword: neutron activation analysis
Theme_Keyword: atomic absorption analysis
Theme_Keyword: chemical analysis
Place:
Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0
Place_Keyword: 02188 = Northwest Arctic
Stratum:
Stratum_Keyword_Thesaurus: none
Stratum_Keyword: Kuna Formation
Stratum_Keyword: Lower Siksikpuk Formation
Stratum_Keyword: Noatak Sandstone
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: John F Slack
Contact_Organization: USGS ER GD
Contact_Address:
Address_Type: mailing address
Address:
Mail Stop 954 USGS National Center
12201 Sunrise Valley Drive
Precision and accuracy for concentrations 100x the minimum detection
limit (MDL) was generally better than ±5 % relative, and in many
cases such as for major elements was better than ±1 % relative.
For concentrations approximately 10x the MDL, precision and accuracy
were about ±10-20 % relative depending on the method used.
Logical_Consistency_Report:
Multiple standards were analyzed together with the submitted rock
samples. Analyses by ACT Labs included data on 8 to 10
compositionally different standards with well-defined elemental
concentrations. In addition to these standards, analyses were
routinely obtained on duplicate samples and Ohio black shale SDO-1
(<http://minerals.cr.usgs.gov/geochem/ohioshale.html>).
Completeness_Report:
Data are available for most elements in most samples. The
code "n.a." is used to indicate an unavailable analysis;
it occurs in only nine fields:
Database
Field Chemical
Label # missing Species
--------------------------------
F 42 (F)
S 5 (S)
SO4 4 (sulfate)
EU 12 (Eu)
CE_CE 5 (Ce/Ce*)
EU_EU 12 (Eu/Eu*)
CD 151 (Cd)
AU 43 (Au)
SE 16 (Se)
Lineage:
Process_Step:
Process_Description:
Geochemical analyses were obtained mostly on samples of diamond
drill core 3.5 or 4.5 cm in diameter. Several analyzed samples
come from mine faces within the Red Dog open pit (Main deposit) or
from outcrops in the region. Samples were cut using water-cooled
diamond saws in order to remove oxidized or weathered surfaces.
Particular care was taken to cut out visible veins from altered
wall rocks so that each analysis would represent a single rock
type. Note, however, that disseminated and laminated sulfides
(e.g., pyrite laminae in black shale) were retained in the samples
prior to analysis. All samples were pulverized in an alumina
ceramic mortar, which in some cases may have produced very minor
contamination by trace amounts of Al, Ba, or rare earth elements
(REE).
Prior to analysis all samples were fused with lithium metaborate/
tetraborate to insure nearly complete acid digestion of resistate
minerals such as zircon, monazite, rutile, chromite, and barite.
All samples were analyzed by Activation Laboratories (ACT Labs) in
Ancaster, Ontario, using methods described on their web site:
<http://www.actlabs.com/>. Major elements, most trace elements,
and REE were determined by inductively-coupled plasma mass
spectrometry (ICP-MS), using an approach similar to that of Jenner
and others (1990). REE in some barite samples were analyzed by
high-resolution, magnetic sector ICP-MS using an ion exchange
technique in order to eliminate Ba interference on Eu. Volatiles
and related components (total C, CO2, Corg, S, SO4) were
determined using conventional methods as described in Jackson and
others (1987). Fluorine was analyzed by the ion selective
electrode technique (Jackson and others, 1987). Data for Sc, Cr,
Co, Au, Sb, As, and Se in most samples were obtained by
instrumental neutron activation analysis (Hoffman, 1992), which
provides more precise results than by ICP-MS. Au concentrations in
most samples of semimassive and massive sulfide were also obtained
by flame atomic absorption (Aruscavage and Crock, 1987) by XRAL
Laboratories of Denver, CO, using on splits of the same rock
powders that were earlier run for major and trace elements, and
REE.
Multiple standards were analyzed together with the submitted rock
samples. Analyses by ACT Labs included data on 8 to 10
compositionally different standards with well-defined elemental
concentrations. In addition to these standards, analyses were
routinely obtained on duplicate samples and Ohio black shale SDO-1
(<http://minerals.cr.usgs.gov/geochem/ohioshale.html>). Precision
and accuracy for concentrations 100x the minimum detection limit
(MDL) was generally better than ±5 % relative, and in many cases
such as for major elements was better than ±1 % relative. For
concentrations approximately 10x the MDL, precision and accuracy
were about ±10-20 % relative depending on the method used.
Process_Date: 2004
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 220
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution:
Longitude_Resolution:
Geographic_Coordinate_Units: decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: reddog.dbf
Entity_Type_Definition: Samples for which geochemical analyses have been conducted
Attribute:
Attribute_Label: SAMPLE_NO
Attribute_Definition: Sample number
Attribute_Domain_Values:
Unrepresentable_Domain: Textual identifier without further scientific significance
Attribute:
Attribute_Label: SAMPLE_DES
Attribute_Definition: Description of the sample
Attribute_Domain_Values:
Unrepresentable_Domain: Plain descriptive text
Attribute:
Attribute_Label: SAMPLE_TYP
Attribute_Definition: Type of sampled material
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Drill core
Enumerated_Domain:
Enumerated_Domain_Value: Open pit face
Enumerated_Domain:
Enumerated_Domain_Value: Outcrop
Attribute:
Attribute_Label: LOCATION
Attribute_Definition: Description of sampled location
Enumerated_Domain_Value: Melange unit of Kuna Formation
Enumerated_Domain:
Enumerated_Domain_Value: Noatak Sandstone
Attribute:
Attribute_Label: SIO2
Attribute_Definition: Silica as SiO2 in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.050
Range_Domain_Maximum: 98.840
Attribute:
Attribute_Label: TIO2
Attribute_Definition: Titanium Oxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.001
Range_Domain_Maximum: 1.404
Attribute:
Attribute_Label: AL2O3
Attribute_Definition: Aluminum oxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0050
Range_Domain_Maximum: 20.7400
Attribute:
Attribute_Label: FE2O3
Attribute_Definition: Iron oxide in percent by weight (total iron reported as Fe2O3)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.03
Range_Domain_Maximum: 55.64
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: MNO
Attribute_Definition: Manganese oxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.001
Range_Domain_Maximum: 8.705
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: MGO
Attribute_Definition: Magnesium oxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 12.96
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: CAO
Attribute_Definition: Calcium oxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 43.78
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: NA2O
Attribute_Definition: Sodium oxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 0.94
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: K2O
Attribute_Definition: Potassium oxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 3.64
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: P2O5
Attribute_Definition: Phosphate as P2O5 in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 6.11
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: LOI
Attribute_Definition: Loss on ignition in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.7
Range_Domain_Maximum: 36.84
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: TOTAL
Attribute_Definition: Total of major element analysis, including LOI
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.15
Range_Domain_Maximum: 101
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: F
Attribute_Definition: Fluorine (F) in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 0.789
Attribute_Units_of_Measure: percent by weight
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: TOTAL_C
Attribute_Definition: Total carbon in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 11.8
Attribute_Units_of_Measure: percent by weight
Enumerated_Domain:
Enumerated_Domain_Value: <0.01
Attribute:
Attribute_Label: CO2
Attribute_Definition: Carbon dioxide in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.4
Range_Domain_Maximum: 37
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: CORG
Attribute_Definition: Organic carbon in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 11.47
Attribute_Units_of_Measure: percent by weight
Attribute:
Attribute_Label: S
Attribute_Definition: Sulfur (S) in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 39.3
Attribute_Units_of_Measure: percent by weight
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: SO4
Attribute_Definition: Sulfate (SO4) in percent by weight
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 43.2
Attribute_Units_of_Measure: percent by weight
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: RB
Attribute_Definition: Rubidium (Rb) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 188
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: CS
Attribute_Definition: Cesium (Cs) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 43.1
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: SR
Attribute_Definition: Strontium (Sr) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4
Range_Domain_Maximum: 3702
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: BA
Attribute_Definition: Barium (Ba) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 42
Range_Domain_Maximum: 581200
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: Y
Attribute_Definition: Yttrium (Y) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.5
Range_Domain_Maximum: 635.7
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: LA
Attribute_Definition: Lanthanum (La) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2
Range_Domain_Maximum: 170
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: CE
Attribute_Definition: Cerium (Ce) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.3
Range_Domain_Maximum: 180.85
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: PR
Attribute_Definition: Praseodymium (Pr) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 33.43
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: ND
Attribute_Definition: Neodymium (Nd) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.03
Range_Domain_Maximum: 165.23
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: SM
Attribute_Definition: Samarium (Sm) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 58.56
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: EU
Attribute_Definition: Europium (Eu) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.003
Range_Domain_Maximum: 146.006
Attribute_Units_of_Measure: ppm (parts per million by weight)
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: GD
Attribute_Definition: Gadolinium (Gd) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 91.78
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: TB
Attribute_Definition: Terbium (Tb) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 13.76
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: DY
Attribute_Definition: Dysprosium (Dy) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 92.72
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: HO
Attribute_Definition: Holmium (Ho) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 18.94
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: ER
Attribute_Definition: Erbium (Er) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 55.79
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: TM
Attribute_Definition: Thulium (Tm) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 6.045
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: YB
Attribute_Definition: Ytterbium (Yb) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 38.61
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: LU
Attribute_Definition: Lutetium (Lu) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.001
Range_Domain_Maximum: 5.243
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: CE_CE
Attribute_Definition:
Cerium anomaly (dimensionless).
The magnitude of the Ce anomaly, Ce/Ce*, is calculated as:
Ce[CN]/((La[CN])**0.667 * (Nd[CN])**0.333)
where Ce[CN], La[CN], and Nd[CN] represent normalization of
Ce, La, and Nd respectively to average chondrites using the
data of Nakamura (1974).
Here two asterisks (**) are used to represent
exponentiation; one alone indicates multiplication.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.43
Range_Domain_Maximum: 1.1526
Attribute_Units_of_Measure: (ratio, no units)
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: EU_EU
Attribute_Definition:
Europium anomaly (dimensionless).
The magnitude of the Eu anomaly, Eu/Eu*, is calculated as:
Eu[CN]/(Sm[CN]*Gd[CN])**0.5
with chondrite normalization of Eu, Sm, and Gd represented
respectively as Eu[CN], Sm[CN], and Gd[CN].
Here two asterisks (**) are used to represent
exponentiation; one alone indicates multiplication.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.482
Range_Domain_Maximum: 19.9335
Attribute_Units_of_Measure: (ratio, no units)
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: ZR
Attribute_Definition: Zirconium (Zr) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 264
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: HF
Attribute_Definition: Hafnium (Hf) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 5.3
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: NB
Attribute_Definition: Niobium (Nb) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 76.6
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: TA
Attribute_Definition: Tantalum (Ta) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 5.8
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: TH
Attribute_Definition: Thorium (Th) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 14.5
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: U
Attribute_Definition: Uranium (U) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2
Range_Domain_Maximum: 156
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: V
Attribute_Definition: Vanadium (V) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 5
Range_Domain_Maximum: 880
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: SC
Attribute_Definition: Scandium (Sc) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 36
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: CR
Attribute_Definition: Chromium (Cr) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 9
Range_Domain_Maximum: 1080
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: CO
Attribute_Definition: Cobalt (Co) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 145
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: NI
Attribute_Definition: Nickel (Ni) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 692
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: MO
Attribute_Definition: Molybdenum (Mo) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.5
Range_Domain_Maximum: 209
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: CU
Attribute_Definition: Copper (Cu) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 9
Range_Domain_Maximum: 484
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: ZN
Attribute_Definition: Zinc (Zn) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 29
Range_Domain_Maximum: 464500
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: CD
Attribute_Definition: Cadmium (Cd) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.3
Range_Domain_Maximum: 1050
Attribute_Units_of_Measure: ppm (parts per million by weight)
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: PB
Attribute_Definition: Lead (Pb) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 5
Range_Domain_Maximum: 163200
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: AG
Attribute_Definition: Silver (Ag) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2
Range_Domain_Maximum: 200
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: AU
Attribute_Definition: Gold (Au) in ppb (parts per billion by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3
Range_Domain_Maximum: 138
Attribute_Units_of_Measure: ppb (parts per billion by weight)
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: GA
Attribute_Definition: Gallium (Ga) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 36
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: GE
Attribute_Definition: Germanium (Ge) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.5
Range_Domain_Maximum: 822.7
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: TL
Attribute_Definition: Thallium (Tl) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 313
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: SB
Attribute_Definition: Antimony (Sb) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 919
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: AS
Attribute_Definition: Arsenic (As) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.3
Range_Domain_Maximum: 672
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: BI
Attribute_Definition: Bismuth (Bi) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 4.3
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: SE
Attribute_Definition: Selenium (Se) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3
Range_Domain_Maximum: 135
Attribute_Units_of_Measure: ppm (parts per million by weight)
Enumerated_Domain:
Enumerated_Domain_Value: n.a.
Attribute:
Attribute_Label: SN
Attribute_Definition: Tin (Sn) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 36
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: W
Attribute_Definition: Tungsten (W) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.3
Range_Domain_Maximum: 10.9
Attribute_Units_of_Measure: ppm (parts per million by weight)
Attribute:
Attribute_Label: BE
Attribute_Definition: Beryllium (Be) in ppm (parts per million by weight)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 7
Attribute_Units_of_Measure: ppm (parts per million by weight)
Although all data published in these grids have been used by the USGS,
no warranty, expressed or implied, is made by the USGS as to the
accuracy of the data and related materials. The act of distribution
shall not constitute any such warranty, and no responsibility is
assumed by the USGS in the use of these data or related materials.
Any use of trade, product, or firm names is for descriptive purposes
only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Version_Number: 1.0
Format_Information_Content: Sample point locations and geochemical analyses
